<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>el挂载点</title>
</head>
<body>
{{message}}
<h2 id="app">
    {{message}}
</h2>


<!-- 开发环境版本，包含了有帮助的命令行警告 -->
<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
<script>
    var app = new Vue({
        el:'#app',
        data:{
            message:'panda bear'
        }
    })
</script>

</body>
</html>